Description

This function gives the square root of a positive real number.
Squaring is the value that can be multiplied by itself to give the original number.
The square root of a number is the inverse operation of squaring that number.
The root of a number is an equal factor of the number.
Every non-negative real number a has only one non-negative square root, called the principal square root, which is denoted by ${\sqrt {a}}$ , where ${\sqrt {}}$ is called the radical sign or radix.
Square roots of positive whole numbers that are not perfect squares are always irrational numbers.
Numbers not expressible as a ratio of two integers .

    This function will give the result as NaN when n is a negative number.

Examples